Quote Originally Posted by DarthEnder
Hichigo started holding his Zangetsu by it's wrapping and swinging it around like a flail, and Ichigo went, "I didn't know you could wield Zangetsu by its wrap."
How does that prove anything but that Ichigo has the wits of a rubber boot?

Arrancar blades as such seem to hold no special abilities whatsoever, so possessing one wouldn't be such a cool thing in the end for a shinigami. The significance would only be to fuse with the blade and gain the true hollow form with all the new attributes it brings with it.